I would certainly be in favour of restoring the python 2.x behaviour, at least where standard error is concerned. When writing Python programs, it's important to see exceptions immediately, and not lose them entirely in some circumstances.
I reported this as a documentation bug because I got the impression it was deliberate, mostly from reading http://bugs.python.org/issue4705 and the comp.lang.python thread in the description, but I personally think the Python 2.x behaviour was preferable.